Mark methods with override in pdf/

pdf/preview_mode_client.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PDF_PREVIEW_MODE_CLIENT_H_
 #define PDF_PREVIEW_MODE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "pdf/pdf_engine.h"
 
 namespace chrome_pdf {
 
 // The interface that's provided to the print preview rendering engine.
 class PreviewModeClient : public PDFEngine::Client {
  public:
   class Client {
    public:
     virtual void PreviewDocumentLoadFailed() = 0;
     virtual void PreviewDocumentLoadComplete() = 0;
   };
+
   explicit PreviewModeClient(Client* client);
-  virtual ~PreviewModeClient() {}
+  ~PreviewModeClient() override {}
 
   // PDFEngine::Client implementation.
-  virtual void DocumentSizeUpdated(const pp::Size& size);
-  virtual void Invalidate(const pp::Rect& rect);
-  virtual void Scroll(const pp::Point& point);
-  virtual void ScrollToX(int position);
-  virtual void ScrollToY(int position);
-  virtual void ScrollToPage(int page);
-  virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
-  virtual void UpdateCursor(PP_CursorType_Dev cursor);
-  virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
-  virtual void NotifyNumberOfFindResultsChanged(int total,
-                                                bool final_result);
-  virtual void NotifySelectedFindResultChanged(int current_find_index);
-  virtual void GetDocumentPassword(
-      pp::CompletionCallbackWithOutput<pp::Var> callback);
-  virtual void Alert(const std::string& message);
-  virtual bool Confirm(const std::string& message);
-  virtual std::string Prompt(const std::string& question,
-                             const std::string& default_answer);
-  virtual std::string GetURL();
-  virtual void Email(const std::string& to,
-                     const std::string& cc,
-                     const std::string& bcc,
-                     const std::string& subject,
-                     const std::string& body);
-  virtual void Print();
-  virtual void SubmitForm(const std::string& url,
-                          const void* data,
-                          int length);
-  virtual std::string ShowFileSelectionDialog();
-  virtual pp::URLLoader CreateURLLoader();
-  virtual void ScheduleCallback(int id, int delay_in_ms);
-  virtual void SearchString(const base::char16* string,
-                            const base::char16* term,
-                            bool case_sensitive,
-                            std::vector<SearchStringResult>* results);
-  virtual void DocumentPaintOccurred();
-  virtual void DocumentLoadComplete(int page_count);
-  virtual void DocumentLoadFailed();
-  virtual pp::Instance* GetPluginInstance();
-  virtual void DocumentHasUnsupportedFeature(const std::string& feature);
-  virtual void DocumentLoadProgress(uint32_t available, uint32_t doc_size);
-  virtual void FormTextFieldFocusChange(bool in_focus);
-  virtual bool IsPrintPreview();
-  virtual uint32_t GetBackgroundColor();
+  void DocumentSizeUpdated(const pp::Size& size) override;
+  void Invalidate(const pp::Rect& rect) override;
+  void Scroll(const pp::Point& point) override;
+  void ScrollToX(int position) override;
+  void ScrollToY(int position) override;
+  void ScrollToPage(int page) override;
+  void NavigateTo(const std::string& url, bool open_in_new_tab) override;
+  void UpdateCursor(PP_CursorType_Dev cursor) override;
+  void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) override;
+  void NotifyNumberOfFindResultsChanged(int total, bool final_result) override;
+  void NotifySelectedFindResultChanged(int current_find_index) override;
+  void GetDocumentPassword(
+      pp::CompletionCallbackWithOutput<pp::Var> callback) override;
+  void Alert(const std::string& message) override;
+  bool Confirm(const std::string& message) override;
+  std::string Prompt(const std::string& question,
+                     const std::string& default_answer) override;
+  std::string GetURL() override;
+  void Email(const std::string& to,
+             const std::string& cc,
+             const std::string& bcc,
+             const std::string& subject,
+             const std::string& body) override;
+  void Print() override;
+  void SubmitForm(const std::string& url,
+                  const void* data,
+                  int length) override;
+  std::string ShowFileSelectionDialog() override;
+  pp::URLLoader CreateURLLoader() override;
+  void ScheduleCallback(int id, int delay_in_ms) override;
+  void SearchString(const base::char16* string,
+                    const base::char16* term,
+                    bool case_sensitive,
+                    std::vector<SearchStringResult>* results) override;
+  void DocumentPaintOccurred() override;
+  void DocumentLoadComplete(int page_count) override;
+  void DocumentLoadFailed() override;
+  pp::Instance* GetPluginInstance() override;
+  void DocumentHasUnsupportedFeature(const std::string& feature) override;
+  void DocumentLoadProgress(uint32_t available, uint32_t doc_size) override;
+  void FormTextFieldFocusChange(bool in_focus) override;
+  bool IsPrintPreview() override;
+  uint32_t GetBackgroundColor() override;
 
  private:
-  Client* client_;
+  Client* const client_;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PREVIEW_MODE_CLIENT_H_